Construction machine

A construction machine including a swing motor that rotates a swing body, a boom cylinder that changes a height of a boom supported on the swing body, and an arm cylinder that changes an angle between an arm supported on the boom and the boom, the construction machine comprising:

• a main pump part including a first pump, which supplies hydraulic oil to the swing motor, and a second pump, which supplies the hydraulic oil to the boom cylinder;
• a manipulation part controlling the first pump and the second pump at a pre-stored horsepower ratio, thereby selecting either a boom priority operation or a swing priority operation;
• a control part controlling performance of the first pump so that the second pump is controlled at a pre-stored maximum horsepower ratio and a swing speed increase rate of the swing body is reduced when the boom priority operation is selected by the manipulation part, wherein the control part stores multiple modes in which a response of the first pump and the second pump and a control speed of the first pump and the second pump are settable to be different;
• and
• an information input/output part displaying a selection status of a mode of the multiple modes and receiving information for changing a setting of the mode.